diff --git a/src/emain.ts b/src/emain.ts
index d58ff75a..f88434f9 100644
--- a/src/emain.ts
+++ b/src/emain.ts
@@ -73,6 +73,15 @@ function createWindow() {
             }
             return;
         }
+        if (input.meta && (input.code == "ArrowUp" || input.code == "ArrowDown")) {
+            if (input.code == "ArrowUp") {
+                win.webContents.send("meta-arrowup");
+            } else {
+                win.webContents.send("meta-arrowdown");
+            }
+            e.preventDefault();
+            return;
+        }
         if (input.code.startsWith("Digit") && input.meta) {
             let digitNum = parseInt(input.code.substr(5));
             if (isNaN(digitNum) || digitNum < 1 || digitNum > 9) {
diff --git a/src/main.tsx b/src/main.tsx
index 74051c35..4c956e24 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -120,7 +120,7 @@ class LineText extends React.Component<{sw : ScreenWindow, line : LineType}, {}>
         let line = this.props.line;
         let formattedTime = getLineDateStr(line.ts);
         return (
-            <div className="line line-text">
+            <div className="line line-text" data-lineid={line.lineid} data-windowid={line.windowid}>
                 <div className="avatar">
                     S
                 </div>
@@ -139,7 +139,7 @@ class LineText extends React.Component<{sw : ScreenWindow, line : LineType}, {}>
 }
 
 @mobxReact.observer
-class LineCmd extends React.Component<{sw : ScreenWindow, line : LineType, width : number, interObs : IntersectionObserver, initVis : boolean}, {}> {
+class LineCmd extends React.Component<{sw : ScreenWindow, line : LineType, width : number, interObs : IntersectionObserver, initVis : boolean, cmdRefNum : number}, {}> {
     termLoaded : mobx.IObservableValue<boolean> = mobx.observable.box(false);
     lineRef : React.RefObject<any> = React.createRef();
     iobsVal : InterObsValue = null;
@@ -249,7 +249,7 @@ class LineCmd extends React.Component<{sw : ScreenWindow, line : LineType, width
     render() {
         let {sw, line, width} = this.props;
         let model = GlobalModel;
-        let lineid = line.lineid.toString();
+        let lineid = line.lineid;
         let formattedTime = getLineDateStr(line.ts);
         let cmd = model.getCmd(line);
         if (cmd == null) {
@@ -271,11 +271,12 @@ class LineCmd extends React.Component<{sw : ScreenWindow, line : LineType, width
         let detached = (status == "detached");
         let termOpts = cmd.getTermOpts();
         let isFocused = sw.getIsFocused(line.cmdid);
+        let cmdRefNumStr = (this.props.cmdRefNum == null ? "?" : this.props.cmdRefNum.toString());
         return (
-            <div className={cn("line", "line-cmd", {"focus": isFocused})} id={"line-" + getLineId(line)} ref={this.lineRef} style={{position: "relative"}}>
+            <div className={cn("line", "line-cmd", {"focus": isFocused})} id={"line-" + getLineId(line)} ref={this.lineRef} style={{position: "relative"}} data-lineid={line.lineid} data-windowid={line.windowid} data-cmdid={line.cmdid}>
                 <div className="line-header">
-                    <div className={cn("avatar",{"num4": lineid.length == 4}, {"num5": lineid.length >= 5}, {"running": running}, {"detached": detached})} onClick={this.doRefresh}>
-                        {lineid}
+                    <div className={cn("avatar",{"num4": cmdRefNumStr.length == 4}, {"num5": cmdRefNumStr.length >= 5}, {"running": running}, {"detached": detached})} onClick={this.doRefresh}>
+                        {cmdRefNumStr}
                     </div>
                     <div className="meta-wrap">
                         <div className="meta">
@@ -301,7 +302,7 @@ class LineCmd extends React.Component<{sw : ScreenWindow, line : LineType, width
 }
 
 @mobxReact.observer
-class Line extends React.Component<{sw : ScreenWindow, line : LineType, width : number, interObs : IntersectionObserver, initVis : boolean}, {}> {
+class Line extends React.Component<{sw : ScreenWindow, line : LineType, width : number, interObs : IntersectionObserver, initVis : boolean, cmdRefNum : number}, {}> {
     render() {
         let line = this.props.line;
         if (line.linetype == "text") {
@@ -702,6 +703,15 @@ class ScreenWindowView extends React.Component<{sw : ScreenWindow}, {}> {
         if (win.lines.length == 0) {
             linesStyle.display = "none";
         }
+        let cmdRefMap : Record<string, number> = {};
+        let cmdNum = 1;
+        for (let i=0; i<win.lines.length; i++) {
+            let line = win.lines[i];
+            if (line.cmdid != null) {
+                cmdRefMap[line.lineid] = cmdNum;
+                cmdNum++;
+            }
+        }
         return (
             <div className="window-view" style={this.getWindowViewStyle()} id={this.getWindowViewDOMId()}>
                 <div key="window-tag" className="window-tag">
@@ -709,7 +719,7 @@ class ScreenWindowView extends React.Component<{sw : ScreenWindow}, {}> {
                 </div>
                 <div key="lines" className="lines" onScroll={this.scrollHandler} id={this.getLinesDOMId()} style={linesStyle}>
                     <For each="line" of={win.lines} index="idx">
-                        <Line key={line.lineid} line={line} sw={sw} width={this.width.get()} interObs={this.interObs} initVis={idx > win.lines.length-1-7}/>
+                        <Line key={line.lineid} line={line} sw={sw} width={this.width.get()} interObs={this.interObs} initVis={idx > win.lines.length-1-7} cmdRefNum={cmdRefMap[line.lineid] ?? 0}/>
                     </For>
                 </div>
                 <If condition={win.lines.length == 0}>
diff --git a/src/model.ts b/src/model.ts
index 42f98e63..0147e189 100644
--- a/src/model.ts
+++ b/src/model.ts
@@ -28,6 +28,8 @@ type ElectronApi = {
     getId : () => string,
     onTCmd : (callback : (mods : KeyModsType) => void) => void,
     onICmd : (callback : (mods : KeyModsType) => void) => void,
+    onMetaArrowUp : (callback : () => void) => void,
+    onMetaArrowDown : (callback : () => void) => void,
     onBracketCmd : (callback : (event : any, arg : {relative : number}, mods : KeyModsType) => void) => void,
     onDigitCmd : (callback : (event : any, arg : {digit : number}, mods : KeyModsType) => void) => void,
     contextScreen : (screenOpts : {screenId : string}, position : {x : number, y : number}) => void,
@@ -285,7 +287,8 @@ class Window {
             if (load) {
                 this.loaded.set(true);
             }
-            genMergeSimpleData(this.lines, win.lines, (l : LineType) => String(l.lineid), (l : LineType) => l.lineid);
+            genMergeSimpleData(this.lines, win.lines, (l : LineType) => String(l.lineid), (l : LineType) => sprintf("%013d:%s", l.ts, l.lineid));
+            
             let cmds = win.cmds || [];
             for (let i=0; i<cmds.length; i++) {
                 this.cmds[cmds[i].cmdid] = new Cmd(cmds[i]);
@@ -308,6 +311,25 @@ class Window {
         return this.cmds[cmdId];
     }
 
+    getRunningCmdLines() : LineType[] {
+        let rtn : LineType[] = [];
+        for (let i=0; i<this.lines.length; i++) {
+            let line = this.lines[i];
+            if (line.cmdid == null) {
+                continue;
+            }
+            let cmd = this.getCmd(line.cmdid);
+            if (cmd == null) {
+                continue;
+            }
+            let status = cmd.getStatus();
+            if (status == "running" || status == "detached") {
+                rtn.push(line);
+            }
+        }
+        return rtn;
+    }
+
     getCurRemoteInstance() : RemoteInstanceType {
         let rname = this.curRemote.get();
         if (rname == null) {
@@ -353,11 +375,12 @@ class Window {
             let lineIdx = 0;
             for (lineIdx=0; lineIdx<lines.length; lineIdx++) {
                 let lineId = lines[lineIdx].lineid;
+                let curTs = lines[lineIdx].ts;
                 if (lineId == line.lineid) {
                     this.lines[lineIdx] = line;
                     return;
                 }
-                if (lineId > line.lineid) {
+                if (curTs > line.ts || (curTs == line.ts && lineId > line.lineid)) {
                     break;
                 }
             }
@@ -637,6 +660,13 @@ class InputModel {
     }
 };
 
+type LineFocusType = {
+    cmdInputFocus : boolean,
+    lineid? : string,
+    windowid? : string,
+    cmdid? : string,
+};
+
 class Model {
     clientId : string;
     activeSessionId : OV<string> = mobx.observable.box(null);
@@ -661,6 +691,8 @@ class Model {
         this.inputModel = new InputModel();
         getApi().onTCmd(this.onTCmd.bind(this));
         getApi().onICmd(this.onICmd.bind(this));
+        getApi().onMetaArrowUp(this.onMetaArrowUp.bind(this));
+        getApi().onMetaArrowDown(this.onMetaArrowDown.bind(this));
         getApi().onBracketCmd(this.onBracketCmd.bind(this));
         getApi().onDigitCmd(this.onDigitCmd.bind(this));
     }
@@ -726,13 +758,122 @@ class Model {
         GlobalInput.createNewScreen();
     }
 
-    onICmd(mods : KeyModsType) {
+    focusCmdInput() : void {
         let elem = document.getElementById("main-cmd-input");
         if (elem != null) {
             elem.focus();
         }
     }
 
+    onICmd(mods : KeyModsType) {
+        this.focusCmdInput();
+    }
+
+    getFocusedLine() : LineFocusType {
+        let elem = document.getElementById("main-cmd-input");
+        if (document.activeElement == elem) {
+            return {cmdInputFocus: true};
+        }
+        let lineElem : any = document.activeElement.closest(".line[data-lineid]");
+        if (lineElem == null) {
+            return null;
+        }
+        return {
+            cmdInputFocus: false,
+            lineid: lineElem.dataset.lineid,
+            windowid: lineElem.dataset.windowid,
+            cmdid: lineElem.dataset.cmdid,
+        };
+    }
+
+    onMetaArrowUp() : void {
+        let focus = this.getFocusedLine();
+        if (focus == null) {
+            return;
+        }
+        let sw : ScreenWindow = null;
+        if (focus.cmdInputFocus) {
+            sw = this.getActiveSW();
+        }
+        else {
+            sw = this.getSWByWindowId(focus.windowid);
+        }
+        if (sw == null) {
+            return;
+        }
+        let win = sw.getWindow();
+        if (win == null) {
+            return;
+        }
+        let runningLines = win.getRunningCmdLines();
+        if (runningLines.length == 0) {
+            return;
+        }
+        let switchLine : LineType = null;
+        if (focus.cmdInputFocus) {
+            switchLine = runningLines[runningLines.length-1];
+        }
+        else {
+            let foundIdx = -1;
+            for (let i=0; i<runningLines.length; i++) {
+                if (runningLines[i].lineid == focus.lineid) {
+                    foundIdx = i;
+                    break;
+                }
+            }
+            if (foundIdx > 0) {
+                switchLine = runningLines[foundIdx-1];
+            }
+        }
+        if (switchLine == null || switchLine.cmdid == null) {
+            return;
+        }
+        let termWrap = sw.getTermWrap(switchLine.cmdid);
+        if (termWrap == null || termWrap.terminal == null) {
+            return;
+        }
+        termWrap.terminal.focus();
+        console.log("arrow-up", this.getFocusedLine(), "=>", switchLine);
+    }
+
+    onMetaArrowDown() : void {
+        let focus = this.getFocusedLine();
+        if (focus == null || focus.cmdInputFocus) {
+            return;
+        }
+        let sw = this.getSWByWindowId(focus.windowid);
+        if (sw == null) {
+            return;
+        }
+        let win = sw.getWindow();
+        if (win == null) {
+            return;
+        }
+        let runningLines = win.getRunningCmdLines();
+        if (runningLines.length == 0) {
+            this.focusCmdInput();
+            return;
+        }
+        let foundIdx = -1;
+        for (let i=0; i<runningLines.length; i++) {
+            if (runningLines[i].lineid == focus.lineid) {
+                foundIdx = i;
+                break;
+            }
+        }
+        if (foundIdx == -1 || foundIdx == runningLines.length - 1) {
+            this.focusCmdInput();
+            return;
+        }
+        let switchLine = runningLines[foundIdx+1];
+        let termWrap = sw.getTermWrap(switchLine.cmdid);
+        if (termWrap == null || termWrap.terminal == null) {
+            return;
+        }
+        termWrap.terminal.focus();
+        console.log("arrow-down", this.getFocusedLine());
+    }
+
     onBracketCmd(e : any, arg : {relative: number}, mods : KeyModsType) {
         console.log("switch screen (bracket)", arg, mods);
         let activeSession = this.getActiveSession();
@@ -801,7 +942,7 @@ class Model {
             let cmdline : CmdLineUpdateType = update.cmdline;
             this.inputModel.updateCmdLine(cmdline);
         }
-        console.log("run-update>", interactive, update);
+        // console.log("run-update>", interactive, update);
     }
 
     getActiveSession() : Session {
@@ -872,6 +1013,22 @@ class Model {
         return this.windows.get(screen.sessionId + "/" + activeWindowId);
     }
 
+    getActiveSW() : ScreenWindow {
+        let screen = this.getActiveScreen();
+        if (screen == null) {
+            return null;
+        }
+        return screen.getActiveSW();
+    }
+
+    getSWByWindowId(windowId : string) : ScreenWindow {
+        let screen = this.getActiveScreen();
+        if (screen == null) {
+            return null;
+        }
+        return screen.getSW(windowId);
+    }
+
     getActiveScreen() : Screen {
         let session = this.getActiveSession();
         if (session == null) {
@@ -1049,7 +1206,7 @@ class Model {
 
     getRemoteByName(name : string) : RemoteType {
         for (let i=0; i<this.remotes.length; i++) {
-            if (this.remotes[i].remotename == name) {
+            if (this.remotes[i].remotecanonicalname == name || this.remotes[i].remotealias == name) {
                 return this.remotes[i];
             }
         }
diff --git a/src/preload.js b/src/preload.js
index b5c8743b..61732952 100644
--- a/src/preload.js
+++ b/src/preload.js
@@ -4,6 +4,8 @@ contextBridge.exposeInMainWorld("api", {
     getId: () => ipcRenderer.sendSync("get-id"),
     onTCmd: (callback) => ipcRenderer.on("t-cmd", callback),
     onICmd: (callback) => ipcRenderer.on("i-cmd", callback),
+    onMetaArrowUp: (callback) => ipcRenderer.on("meta-arrowup", callback),
+    onMetaArrowDown: (callback) => ipcRenderer.on("meta-arrowdown", callback),
     onBracketCmd: (callback) => ipcRenderer.on("bracket-cmd", callback),
     onDigitCmd: (callback) => ipcRenderer.on("digit-cmd", callback),
     contextScreen: (screenOpts, position) => ipcRenderer.send("context-screen", screenOpts, position),
diff --git a/src/sh2.ts b/src/sh2.ts
index 90a808fe..09e22955 100644
--- a/src/sh2.ts
+++ b/src/sh2.ts
@@ -19,5 +19,6 @@ document.addEventListener("DOMContentLoaded", () => {
 });
 
 (window as any).mobx = mobx;
+(window as any).sprintf = sprintf;
 
 console.log("SCRIPTHAUS", VERSION)
diff --git a/src/term.ts b/src/term.ts
index c3742d08..5c981d0c 100644
--- a/src/term.ts
+++ b/src/term.ts
@@ -194,8 +194,9 @@ class TermWrap {
             this.dataUpdates.push({data: data, pos: pos});
             return;
         }
+        console.log("pty-update", this.cmdId, this.ptyPos, data.length);
         if (pos > this.ptyPos) {
-            throw new Error(sprintf("invalid pty-update, data-pos[%d] does not match term-pos[%d]", pos, this.ptyPos));
+            throw new Error(sprintf("invalid pty-update, data-pos[%d] does not match term-pos[%d] cmdid[%s]", pos, this.ptyPos, this.cmdId));
         }
         if (pos < this.ptyPos) {
             let diff = this.ptyPos - pos;
diff --git a/src/types.ts b/src/types.ts
index e01cc66d..ace44d52 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -17,7 +17,7 @@ type SessionDataType = {
 type LineType = {
     sessionid : string,
     windowid : string,
-    lineid : number,
+    lineid : string,
     ts : number,
     userid : string,
     linetype : string,
@@ -71,7 +71,9 @@ type ScreenWindowType = {
 type RemoteType = {
     remotetype : string,
     remoteid : string,
-    remotename : string,
+    physicalid : string,
+    remotealias : string,
+    remotecanonicalname : string,
     remotevars : Record<string, string>,
     status : string,
     defaultstate : RemoteStateType,
@@ -112,7 +114,7 @@ type HistoryItem = {
     sessionid : string,
     screenid : string,
     windowid : string,
-    lineid : number,
+    lineid : string,
     haderror : boolean,
     cmdid : string,
     cmdstr : string,
diff --git a/src/util.ts b/src/util.ts
index b32a3c71..b2072997 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -62,7 +62,7 @@ interface ISimpleDataType {
     remove? : boolean;
 }
 
-function genMergeSimpleData<T extends ISimpleDataType>(objs : mobx.IObservableArray<T>, dataArr : T[], idFn : (obj : T) => string, sortIdxFn : (obj : T) => number) {
+function genMergeSimpleData<T extends ISimpleDataType>(objs : mobx.IObservableArray<T>, dataArr : T[], idFn : (obj : T) => string, sortIdxFn : (obj : T) => string) {
     if (dataArr == null || dataArr.length == 0) {
         return;
     }
@@ -86,7 +86,9 @@ function genMergeSimpleData<T extends ISimpleDataType>(objs : mobx.IObservableAr
     let newObjs = Object.values(objMap);
     if (sortIdxFn) {
         newObjs.sort((a, b) => {
-            return sortIdxFn(a) - sortIdxFn(b);
+            let astr = sortIdxFn(a);
+            let bstr = sortIdxFn(b);
+            return astr.localeCompare(bstr);
         });
     }
     objs.replace(newObjs);